java.lang.ClassCastException: net.sf.jabref.model.groups.RegexKeywordGroup cannot be cast to net.sf.jabref.model.groups.WordKeywordGroup


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net.sf.jabref.model.groups.RegexKeywordGroup cannot be cast to net.sf.jabref.model.groups.WordKeywordGroup

Stack trace

java.lang.ClassCastException: net.sf.jabref.model.groups.RegexKeywordGroup cannot be cast to net.sf.jabref.model.groups.WordKeywordGroup
	at net.sf.jabref.gui.groups.GroupDialog.<init>(GroupDialog.java:317)[JabRef_3.8.1.jar:?]
	at net.sf.jabref.gui.groups.GroupSelector$EditGroupAction.actionPerformed(GroupSelector.java:790)[JabRef_3.8.1.jar:?]
	at net.sf.jabref.gui.groups.GroupSelector$3.mouseClicked(GroupSelector.java:413)[JabRef_3.8.1.jar:?]
	at java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaster.java:270)[?:1.8.0_66-internal]
	at java.awt.Component.processMouseEvent(Component.java:6538)[?:1.8.0_66-internal]
	at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)[?:1.8.0_66-internal]
	at java.awt.Component.processEvent(Component.java:6300)[?:1.8.0_66-internal]
	at java.awt.Container.processEvent(Container.java:2236)[?:1.8.0_66-internal]
	at java.awt.Component.dispatchEventImpl(Component.java:4891)[?:1.8.0_66-internal]
	at java.awt.Container.dispatchEventImpl(Container.java:2294)[?:1.8.0_66-internal]
	at java.awt.Component.dispatchEvent(Component.java:4713)[?:1.8.0_66-internal]
	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4888)[?:1.8.0_66-internal]
	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4534)[?:1.8.0_66-internal]
	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4466)[?:1.8.0_66-internal]
	at java.awt.Container.dispatchEventImpl(Container.java:2280)[?:1.8.0_66-internal]
	at java.awt.Window.dispatchEventImpl(Window.java:2750)[?:1.8.0_66-internal]
	at java.awt.Component.dispatchEvent(Component.java:4713)[?:1.8.0_66-internal]
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)[?:1.8.0_66-internal]
	at java.awt.EventQueue.access$500(EventQueue.java:97)[?:1.8.0_66-internal]
	at java.awt.EventQueue$3.run(EventQueue.java:709)[?:1.8.0_66-internal]
	at java.awt.EventQueue$3.run(EventQueue.java:703)[?:1.8.0_66-internal]
	at java.security.AccessController.doPrivileged(Native Method)[?:1.8.0_66-internal]
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)[?:1.8.0_66-internal]
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)[?:1.8.0_66-internal]
	at java.awt.EventQueue$4.run(EventQueue.java:731)[?:1.8.0_66-internal]
	at java.awt.EventQueue$4.run(EventQueue.java:729)[?:1.8.0_66-internal]
	at java.security.AccessController.doPrivileged(Native Method)[?:1.8.0_66-internal]
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)[?:1.8.0_66-internal]
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)[?:1.8.0_66-internal]
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)[?:1.8.0_66-internal]
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)[?:1.8.0_66-internal]
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)[?:1.8.0_66-internal]
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)[?:1.8.0_66-internal]
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)[?:1.8.0_66-internal]
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)[?:1.8.0_66-internal]

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